**CIGAL Reference Manual, Chapter 6 (RealTime): r_uwait**
===== r_uwait -- Wait for user input from the keyboard or mouse =====
**usage: r_uwait  opflg eflag ltime [Databuf Timebuf Flag Waitcode]**

R_UWAIT is a REALTIME operator that waits for a button to be pressed on
the computer keyboard or mouse.

TIMEBUF can be used to specify a long integer or array to store the time when the wait
terminated.  If the DATABUF is an autoincremented array (e.g. buf++) then
TIMEBUF will also be incremented after storing the timestamp.

FLAG can be used to specify options:\\
  4 - do nothing else until this wait condition is satisfied

WAITCODE can be used to specify a particular key value to wait for (all other key presses are ignored).

**See Also:**\\
[[jvs:cigal|CIGAL Home]], 
[[jvs:cigal:manual|CIGAL Manual]], 
[[jvs:cigal:manual:chapter6|RealTime List]], 
[[jvs:cigal:manual:help|Manual Help]]